两片74hc165级联的驱动，用protues 7.1仿真 c语言-two 74hc165 cascade driven by protues 7.1 simulation language c

595 and 165 driver

可连接120位，或以上按键的读取，165应用-Can connect 120 bits, or more buttons read, 165 applications

arduino音乐1 2 3 4 5 6 7的数字代码 低音C:131,147,165,175,196,221,248 中央C:262,294,330,350,393,441,495 高音C:525,589,661,700,786,882,990(Arduino music 1234567 digital code Bass C:131 147 165 175 196 221 248 Central C:262 294 330 350 393 441 495